Insulator-support.



No. 878,870. PATENTED FEB 11, 1908. T. J. UREAGHEAD.

INSULATOR SUPPORT.

APPLIOATION FILED HAY 19,1902.

WHWESSES: INVEN-TOR. ,dqle 2 2 24/14, w B) C M ATTORNEY.

UNITED STATES PATENT OFFIOE.-

v THOMAS JJCREAGHEAD, or covmeron, KENTUCKY.

IN SULATOR-SUPPORT.

Specification of Letters Patent.

Patented Feb. 11'; 1908.

Application filed Hay 19.1902. Serial No. 108.057.

To c11l whom'itma-y concern: Be it known that I, THOMAS J. CREAG- nst ll, a citizen of the UniteclStates, residing at Covingtou, in the county of Kenton and State of Kentucky, have invented certain new and useful Improvements in Insulator- Supports, of which the following is affull, clear, and exact description, reference being had to the accompanying drawing, forming part .of this specification.

My invention relates to insulator supports for electrical conductors and it has for its object, to furnish substantial and durable support of such size as to be adapted to carry strains of considerable magnitude and yet one which can be readily and easily secured to an ordinary cross arm, or other support, by a bolt of such comparatively small diameter passing through or into the support, as not to unlluly weaken the.

same.- I

The essential feature of m improvements consist of-a malleable iron, mine, or other casting, having a wide base extending into tions of the support taken on lines 44 and 5-- 5 respectively of Figure 1.

A is -the insulator support ofmalleable iron, bronze, or other cast metal, provided uith a broad base s having afoot flange (1.

' Extending from the base are longitudinal strengthening ribs 6, b, which taper upwards and terminate in a transverse web or ca pir-ce c forming with the portions of the ribs adjacent thei eto a series of recesses or seats at the top of the support for the reception oi the material of a thimble or othcrinsulator attaching means, such attaching means being molded or otherwise formed about the transcasing the same. I

Uponthe head 0 and. engaging the portions of the strengthening ribs b, 6 adjacent there to, is mounted a thimble (L' of suitable soft material, preferably lead or other soft metal,

which may be cast or molded thcreabout, to form an attaching means and cushion for the insulator B. By this construction it will be seen that, as portions of the ribs b, b, and.

verse web and portions of the ribs and in the head 0, are incased in the thimble, the latter is prevented from'turning or working off.

d is a threaded recess formed in the base of the insulator support to receive the screwthreaded end of the bolt C, which asses through the cross-arm and is secured t ereto by the nut e and washer f.

Upon the. principles of the lever, the

amount of strain upon the bolt C under any given pull of wire upon the insulator, varies inversely as the distance of the bearing point in the base of the insulator sup ort from the point of strain in the, bolt. I removal of this point of hearing as far as possible from' the bolt, and overcome the dis-1 o insure the advantages arising from unevenness in the base of the ordinary broad based supports,

or in the surfaces oi the cross-bars to which they are attached, I have constructed the broad base 8 with a projecting bearing surface a at its outer edge whereby the strain is necessarily thrown at a point removed from the bolt and the purposes of a broad base;

made effective.

I claim and desire to secure by Letters'Patent lS- A metal insulator support comprising a;

stem provided with .longitudinal strengthen? ing ribs and a transverse web or cap-piece to which said ribs extend, a thunb Having thus described my invention what e of soft metal or other material molded about said,

web and portions of the ribs, whereby said 'thimble is secured against-rotary movement and vertical displacement, and means for securing said stem to a cross-arm or other support.

THOMAS J. CREAGIIEAD. "Vi tncsscs W..S. KYLE,

E. G. SEAMER. 

